OFFSET
0,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..500
Index entries for linear recurrences with constant coefficients, signature (8, -7).
FORMULA
a(n) = 7*a(n-1)-14, a(0)=1.
a(n) = 8*a(n-1) - 7*a(n-2), a(0)= 1, a(1)= -7, for n>1.
G.f.: (1-15x)/(1-8x+7x^2).
a(n) = Sum_{0<=k<=n} A112555(n,k)*(-8)^(n-k).
E.g.f.: (1/3)*(7*exp(x) - 4*exp(7*x)). - G. C. Greubel, Apr 07 2016
MATHEMATICA
(7-4*7^Range[0, 20])/3 (* or *) LinearRecurrence[{8, -7}, {1, -7}, 30] (* Harvey P. Dale, Dec 21 2014 *)
CROSSREFS
KEYWORD
easy,sign
AUTHOR
Philippe Deléham, Sep 26 2009
EXTENSIONS
Corrected and extended by Harvey P. Dale, Dec 21 2014
STATUS
approved